Hi, im new to this game, i just got my first DSLR I had an old PENTAX MV1 but i now have a Samsung, i have a 18-55 and 50-200mm lens but i want MORE!!! Im looking for a 400 or 500mm for reasonable price. I would be very grateful if you could recommend some and if possible give me some links to good sites!

thanks very much!

Gavin